CN109087354A - A kind of position algorithm of the best object distance of automatic search and image distance - Google Patents
A kind of position algorithm of the best object distance of automatic search and image distance Download PDFInfo
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- CN109087354A CN109087354A CN201810993405.8A CN201810993405A CN109087354A CN 109087354 A CN109087354 A CN 109087354A CN 201810993405 A CN201810993405 A CN 201810993405A CN 109087354 A CN109087354 A CN 109087354A
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- image
- servo
- distance
- object distance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30168—Image quality inspection
Abstract
The invention discloses the position algorithms that one kind searches for best object distance and image distance automatically, comprising the following steps: servo origin resets and moves to zero point；From servo origin, each servo metric element shoots a picture by camera, and numbers storage, until servo motion to the upper limit is ended；The piece image of storage is shown, and given observation area, carry out image definition detection, the present invention is before testing product, acquire several product images, the optimum photographing position of product is analyzed according to image definition, servo position is corrected on this basis, to reach optimal camera site, it can be realized the image distance and object distance that best camera is switched fast after replacing product by the algorithm, without manual adjustment, efficiency greatly improves, and the judgement of clarity is also unified standard, previous artificial eye identification error is made to greatly reduce, the algorithm is widely used, with more vast market prospect, convenient for promoting.
Description
Technical field
The present invention relates to automatic measurement technique field, specially a kind of position calculation for searching for best object distance and image distance automatically
Method.
Background technique
During vision-based detection, due to the presence of the certain difference in height of measured object, not when shooting picture
It can be operated with unique object distance with image distance, if it is desired to needing operator when individually checking the image of a certain height and position
The image distance and object distance for manually adjusting shooting of work gradually, and the judgement of clarity is also to go to differentiate by artificial eye, in this way
The mode of detection not only low efficiency, and artificial eye judgement also has certain subjectivity, and there are biggish errors.
Summary of the invention
The problem of for background technique, the present invention provides the positions that one kind searches for best object distance and image distance automatically
Algorithm.
To achieve the above object, the invention provides the following technical scheme: a kind of position for searching for best object distance and image distance automatically
Set algorithm, comprising the following steps:
S10: servo origin resets and moves to zero point；
S20: from servo origin, each servo metric element shoots a picture by camera, and numbers storage,
End to servo motion to the upper limit；
S30: the piece image of storage being shown, and given observation area, carries out image definition detection.
As a preferred technical solution of the present invention, in step S30, the method for specific image definition detection
Are as follows:
Image relative contrast is calculated according to the gray value of adjacent pixel values, after executing every time, image is returned and specifies region
Contrast difference returns to contrast score, by the contrast point for analyzing each image by keeping all optical parameters consistent
Number, obtains optimal contrast score, according to the number for the image for obtaining optimal contrast score, determines optimal servo bit
It sets, realizes the adjusting of best image distance, object distance.
As a preferred technical solution of the present invention, in step S20, each servo metric element of object distance is 1mm.
Compared with prior art, the beneficial effects of the present invention are: the present invention is before testing product, several product figures are acquired
Picture analyzes the optimum photographing position of product according to image definition, servo position is corrected on this basis, to reach optimal
Camera site can be realized the image distance and object distance that best camera is switched fast after replacing product by the algorithm, adjust without artificial
Section, efficiency greatly improve, and the judgement of clarity is also unified standard, and previous artificial eye identification error is made to subtract significantly
Small, which is widely used, and has more vast market prospect, convenient for promoting.
Detailed description of the invention
Fig. 1 is the position algorithm flow diagram that one kind provided by the invention searches for best object distance and image distance automatically；
Fig. 2 is the position algorithm operation interface schematic diagram that one kind provided by the invention searches for best object distance and image distance automatically；
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please referring to Fig. 1 and Fig. 2, the present invention provides a kind of position algorithm for searching for best object distance and image distance automatically, including with
Lower step:
S10: servo origin resets and moves to zero point；
S20: from servo origin, each servo metric element shoots a picture by camera, and numbers storage,
End to servo motion to the upper limit；
S30: the piece image of storage being shown, and given observation area, carries out image definition detection.
The present invention adjusts servomechanism installation by assembling corresponding object distance and image distance in traditional visual detection equipment, passes through
The burned above-mentioned algorithm of control cabinet is moved to control the servomechanism installation of corresponding object distance and image distance, finally realizes optimal object
Away from and image distance position.
In the specific implementation process, in step S30, the method for specific image definition detection are as follows:
Image relative contrast is calculated according to the gray value of adjacent pixel values, after executing every time, image is returned and specifies region
Contrast difference returns to contrast score, by the contrast point for analyzing each image by keeping all optical parameters consistent
Number, obtains optimal contrast score, according to the number for the image for obtaining optimal contrast score, determines optimal servo bit
It sets, realizes the adjusting of best image distance, object distance.
In the specific implementation process, in step S20, each servo metric element of object distance is 1mm.
Based on above-mentioned, present invention has the advantage that: the present invention acquires several product images, root before testing product
According to the optimum photographing position of image definition analysis product, servo position is corrected on this basis, to reach optimal shooting
Position can be realized the image distance and object distance that best camera is switched fast after replacing product by the algorithm, be not necessarily to manual adjustment, effect
Rate greatly improves, and the judgement of clarity is also unified standard, makes previous artificial eye identification error greatly reduce, the calculation
Method is widely used, and has more vast market prospect, convenient for promoting.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (3)
1. the position algorithm that one kind searches for best object distance and image distance automatically, it is characterised in that the following steps are included:
S10: servo origin resets and moves to zero point；
S20: from servo origin, each servo metric element shoots a picture by camera, and numbers storage, until watching
Clothes move to upper limit cut-off；
S30: the piece image of storage being shown, and given observation area, carries out image definition detection.
2. the position algorithm that one kind according to claim 1 searches for best object distance and image distance automatically, it is characterised in that: Yu Bu
In rapid S30, the method for specific image definition detection are as follows:
Image relative contrast is calculated according to the gray value of adjacent pixel values, after executing every time, image is returned and specifies regional correlation
Difference returns to contrast score, by analyzing the contrast score of each image, obtains by keeping all optical parameters consistent
Optimal contrast score is taken, according to the number for the image for obtaining optimal contrast score, determines optimal servo position, it is real
The now adjusting of best image distance, object distance.
3. the position algorithm that one kind according to claim 1 searches for best object distance and image distance automatically, it is characterised in that: Yu Bu
In rapid S20, each servo metric element of object distance is 1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810993405.8A CN109087354A (en) | 2018-08-29 | 2018-08-29 | A kind of position algorithm of the best object distance of automatic search and image distance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810993405.8A CN109087354A (en) | 2018-08-29 | 2018-08-29 | A kind of position algorithm of the best object distance of automatic search and image distance |
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| CN109087354A true CN109087354A (en) | 2018-12-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030081137A1 (en) * | 2001-10-26 | 2003-05-01 | Fuji Photo Film Co., Ltd. | Device and method for autofocus adjustment |
| CN101813946A (en) * | 2009-02-19 | 2010-08-25 | 中国科学院自动化研究所 | Automatic object distance adjusting method and device of imaging system |
| CN102062929A (en) * | 2010-11-27 | 2011-05-18 | 长春迪瑞医疗科技股份有限公司 | Automatic focusing method and device for microscope system |
| CN104215215A (en) * | 2014-08-21 | 2014-12-17 | 深圳市金立通信设备有限公司 | Ranging method |
| CN106154688A (en) * | 2015-04-07 | 2016-11-23 | 中兴通讯股份有限公司 | A kind of method and device of auto-focusing |
-
2018
- 2018-08-29 CN CN201810993405.8A patent/CN109087354A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030081137A1 (en) * | 2001-10-26 | 2003-05-01 | Fuji Photo Film Co., Ltd. | Device and method for autofocus adjustment |
| CN101813946A (en) * | 2009-02-19 | 2010-08-25 | 中国科学院自动化研究所 | Automatic object distance adjusting method and device of imaging system |
| CN102062929A (en) * | 2010-11-27 | 2011-05-18 | 长春迪瑞医疗科技股份有限公司 | Automatic focusing method and device for microscope system |
| CN104215215A (en) * | 2014-08-21 | 2014-12-17 | 深圳市金立通信设备有限公司 | Ranging method |
| CN106154688A (en) * | 2015-04-07 | 2016-11-23 | 中兴通讯股份有限公司 | A kind of method and device of auto-focusing |
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Application publication date: 20181225 |